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-rw-r--r--arch/arm/common/bL_switcher.c16
-rw-r--r--include/linux/clockchips.h6
-rw-r--r--include/linux/tick.h19
-rw-r--r--kernel/time/tick-common.c2
-rw-r--r--kernel/time/tick-internal.h5
-rw-r--r--kernel/time/tick-sched.h10
6 files changed, 22 insertions, 36 deletions
diff --git a/arch/arm/common/bL_switcher.c b/arch/arm/common/bL_switcher.c
index d4f970a..37dc0fe 100644
--- a/arch/arm/common/bL_switcher.c
+++ b/arch/arm/common/bL_switcher.c
@@ -151,8 +151,6 @@ static int bL_switch_to(unsigned int new_cluster_id)
unsigned int mpidr, this_cpu, that_cpu;
unsigned int ob_mpidr, ob_cpu, ob_cluster, ib_mpidr, ib_cpu, ib_cluster;
struct completion inbound_alive;
- struct tick_device *tdev;
- enum clock_event_state tdev_state;
long volatile *handshake_ptr;
int ipi_nr, ret;
@@ -219,13 +217,7 @@ static int bL_switch_to(unsigned int new_cluster_id)
/* redirect GIC's SGIs to our counterpart */
gic_migrate_target(bL_gic_id[ib_cpu][ib_cluster]);
- tdev = tick_get_device(this_cpu);
- if (tdev && !cpumask_equal(tdev->evtdev->cpumask, cpumask_of(this_cpu)))
- tdev = NULL;
- if (tdev) {
- tdev_state = tdev->evtdev->state;
- clockevents_set_state(tdev->evtdev, CLOCK_EVT_STATE_SHUTDOWN);
- }
+ tick_suspend_local();
ret = cpu_pm_enter();
@@ -251,11 +243,7 @@ static int bL_switch_to(unsigned int new_cluster_id)
ret = cpu_pm_exit();
- if (tdev) {
- clockevents_set_state(tdev->evtdev, tdev_state);
- clockevents_program_event(tdev->evtdev,
- tdev->evtdev->next_event, 1);
- }
+ tick_resume_local();
trace_cpu_migrate_finish(ktime_get_real_ns(), ib_mpidr);
local_fiq_enable();
diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index 50ce975..3ac7e2d 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -198,12 +198,6 @@ clockevents_calc_mult_shift(struct clock_event_device *ce, u32 freq, u32 minsec)
freq, minsec);
}
-/* Should be core only, but is abused by arm bl_switcher */
-extern void clockevents_set_state(struct clock_event_device *dev,
- enum clock_event_state state);
-extern int clockevents_program_event(struct clock_event_device *dev,
- ktime_t expires, bool force);
-
extern void clockevents_suspend(void);
extern void clockevents_resume(void);
diff --git a/include/linux/tick.h b/include/linux/tick.h
index a3d4d28..589868b 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -11,30 +11,19 @@
#include <linux/cpumask.h>
#include <linux/sched.h>
-/* ARM BL switcher abuse support */
-#ifdef CONFIG_GENERIC_CLOCKEVENTS
-enum tick_device_mode {
- TICKDEV_MODE_PERIODIC,
- TICKDEV_MODE_ONESHOT,
-};
-
-struct tick_device {
- struct clock_event_device *evtdev;
- enum tick_device_mode mode;
-};
-extern struct tick_device *tick_get_device(int cpu);
-#endif
-
#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void __init tick_init(void);
extern void tick_freeze(void);
extern void tick_unfreeze(void);
-/* Should be core only, but XEN resume magic requires this */
+/* Should be core only, but ARM BL switcher requires it */
+extern void tick_suspend_local(void);
+/* Should be core only, but XEN resume magic and ARM BL switcher require it */
extern void tick_resume_local(void);
#else /* CONFIG_GENERIC_CLOCKEVENTS */
static inline void tick_init(void) { }
static inline void tick_freeze(void) { }
static inline void tick_unfreeze(void) { }
+static inline void tick_suspend_local(void) { }
static inline void tick_resume_local(void) { }
#endif /* !CONFIG_GENERIC_CLOCKEVENTS */
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index da796d6..e28ba5c 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -380,7 +380,7 @@ void tick_shutdown(unsigned int *cpup)
*
* No locks required. Nothing can change the per cpu device.
*/
-static void tick_suspend_local(void)
+void tick_suspend_local(void)
{
struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index 6ba7bce..5fc2daf 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -28,6 +28,7 @@ extern bool tick_check_replacement(struct clock_event_device *curdev,
struct clock_event_device *newdev);
extern void tick_install_replacement(struct clock_event_device *dev);
extern int tick_is_oneshot_available(void);
+extern struct tick_device *tick_get_device(int cpu);
extern int clockevents_tick_resume(struct clock_event_device *dev);
/* Check, if the device is functional or a dummy for broadcast */
@@ -39,6 +40,10 @@ static inline int tick_device_is_functional(struct clock_event_device *dev)
extern void clockevents_shutdown(struct clock_event_device *dev);
extern void clockevents_exchange_device(struct clock_event_device *old,
struct clock_event_device *new);
+extern void clockevents_set_state(struct clock_event_device *dev,
+ enum clock_event_state state);
+extern int clockevents_program_event(struct clock_event_device *dev,
+ ktime_t expires, bool force);
extern void clockevents_handle_noop(struct clock_event_device *dev);
extern int __clockevents_update_freq(struct clock_event_device *dev, u32 freq);
extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt);
diff --git a/kernel/time/tick-sched.h b/kernel/time/tick-sched.h
index 9307432..28b5da3 100644
--- a/kernel/time/tick-sched.h
+++ b/kernel/time/tick-sched.h
@@ -3,6 +3,16 @@
#include <linux/hrtimer.h>
+enum tick_device_mode {
+ TICKDEV_MODE_PERIODIC,
+ TICKDEV_MODE_ONESHOT,
+};
+
+struct tick_device {
+ struct clock_event_device *evtdev;
+ enum tick_device_mode mode;
+};
+
enum tick_nohz_mode {
NOHZ_MODE_INACTIVE,
NOHZ_MODE_LOWRES,
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